Control aspects of the Bayesian search process
control_bayes(
verbose = FALSE,
no_improve = 10L,
uncertain = Inf,
seed = sample.int(10^5, 1),
extract = NULL,
save_pred = FALSE,
time_limit = NA,
pkgs = NULL,
save_workflow = FALSE
)A logical for logging results as they are generated. Despite
this argument, warnings and errors are always shown. If using a dark IDE
theme, some logging messages might be hard to see. If this is the case,
try setting the tidymodels.dark option with
options(tidymodels.dark = TRUE) to print lighter colors.
The integer cutoff for the number of iterations without better results.
The number of iterations with no improvement before an
uncertainty sample is created where a sample with high predicted variance is
chosen (i.e., in a region that has not yet been explored). The iteration
counter is reset after each uncertainty sample. For example, if uncertain = 10, this condition is triggered every 10 samples with no improvement.
An integer for controlling the random number stream.
An optional function with at least one argument (or NULL)
that can be used to retain arbitrary objects from the model fit object,
recipe, or other elements of the workflow.
A logical for whether the out-of-sample predictions should be saved for each model evaluated.
A number for the minimum number of minutes (elapsed) that
the function should execute. The elapsed time is evaluated at internal
checkpoints and, if over time, the results at that time are returned (with
a warning). This means that the time_limit is not an exact limit, but a
minimum time limit.
An optional character string of R package names that should be loaded (by namespace) during parallel processing.
A logical for whether the workflow should be appended to the output as an attribute.
For extract, this function can be used to output the model object, the
recipe (if used), or some components of either or both. When evaluated, the
function's sole argument has a fitted workflow If the formula method is used,
the recipe element will be NULL.
The results of the extract function are added to a list column in the
output called .extracts. Each element of this list is a tibble with tuning
parameter column and a list column (also called .extracts) that contains
the results of the function. If no extraction function is used, there is no
.extracts column in the resulting object. See tune_bayes() for more
specific details.
Note that for collect_predictions(), it is possible that each row of the
original data point might be represented multiple times per tuning
parameter. For example, if the bootstrap or repeated cross-validation are
used, there will be multiple rows since the sample data point has been
evaluated multiple times. This may cause issues when merging the predictions
with the original data.